Matthew James Koster, M.D.
Rheumatology Physician · Rochester, MN
Matthew James Koster, M.D. is a rheumatology physician with a practice address in Rochester, Minnesota, and NPI 1588891469, issued on Jun 17, 2009. Check the license (Minnesota 56961, as entered in NPPES) on the Minnesota Board of Medical Practice; the Medicare figures below come from public CMS files.
- Name
- Matthew James Koster
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License numbers
- 56961 MN
106941 MN
BF4649604-A357 IL
Self-reported in NPPES; status is on the state search - Practice location
- 200 1St St SW, Rochester, MN 55905
- Phone
- (507) 284-2511
- Enumerated
- Jun 17, 2009
- Record last updated
- Aug 14, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20130731000290); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 2009
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 173 in Minnesota → Look up another NPI →
Also registered at 200 1St St SW
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Timothy Aadland, M.D.Diagnostic Radiology Physician1780662783
- Christopher Aakre, MDInternal Medicine Physician1508151663
- Kathryn Aaro, P.T.Physical Therapist1619360666
- Danielle Aase, MDReproductive Endocrinology Physician1316524135
- Uzoamaka Abajue, PHARMDPharmacist1982335295
- Francisco Abarca Rendon, MDIndependent Medical Examiner Physician1790096246
Verify Matthew James Koster in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 56961Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average rheumatology physician in 2024
400 Medicare Part D claims for 95 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Prednisone135 claims
- Alendronate Sodium37 claims
- Sulfamethoxazole-Trimethoprim27 claims
- Mycophenolate Mofetil26 claims
- Actemra Actpen22 claims
- Methotrexate20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,013.40
3 payments; by number, the most common kind was consulting fee; the largest payer was Amgen Inc. The 4,486 providers of this specialty with any payment received $8,538.33 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Mayo ClinicRochester, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Matthew James Koster among 173 rheumatology physician records in Minnesota
Matthew James Koster, M.D. is one of 173 rheumatology physician records with a practice address in Minnesota. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 61% of them.
- NPI issued2009 · 61% of these records are older, 37% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2009 · median 2008 among the 116 with a school on file
- Record last updated2020 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Minnesota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Minnesota
There are 173 rheumatology physician records in Minnesota.
All 173 in Minnesota → Every provider in Rochester → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Shreyasee Amin, M.D.Rochester, MN 559051316917552
- John Davis, M.D.Rochester, MN 559051881665024
- Joseph Duffy, M.D.Rochester, MN 559051770563769
- Floranne Ernste, M.D.Rochester, MN 559051033180641
- Sherine Gabriel, M.D.Rochester, MN 559051952389348
- Jacob Ijdo, MDRochester, MN 559051720075872
- Harvinder Luthra, MBBSRochester, MN 559051285614321
- Thomas Mason, M.D.Rochester, MN 559051104805522
Common questions
What is Matthew James Koster, M.D.'s NPI number?
Matthew James Koster, M.D.'s National Provider Identifier (NPI) is 1588891469, issued on Jun 17, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Matthew James Koster, M.D. located?
The NPPES record lists a practice address at 200 1St St SW, Rochester, MN, 55905. Phone: (507) 284-2511. Providers update this record themselves, so call before visiting.
How can I verify Matthew James Koster, M.D.'s license?
NPPES lists Minnesota license number 56961, as entered by the provider. Search the Minnesota Board of Medical Practice at https://mn.gov/boards/medical-practice/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Matthew James Koster, M.D. prescribe under Medicare Part D?
In 2024, Matthew James Koster, M.D. had 400 Medicare Part D claims for 95 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.